/* Copyright (c) 2022-2022, LiWangQian<liwangqian@huawei.com> All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <catch2/catch.hpp>
#include "libdag/thenable.hpp"

struct foo {
    void operator()(void *p) const noexcept
    {
        REQUIRE(p != nullptr);
    }
};

void bar(void *p) noexcept
{
    REQUIRE(p != nullptr);
}

TEST_CASE("test.libdag.thenable")
{
    SECTION("then.with.lambda")
    {
        libdag::ithenable *t = new libdag::thenable{};
        REQUIRE(t != nullptr);
        t->then([](void *p) {
            REQUIRE(p != nullptr);
        }, [](void *p) {
            REQUIRE(p == nullptr);
        });

        t->invoke(true, t);
        t->invoke(false, nullptr);

        delete t;
    }

    SECTION("then.with.functor")
    {
        libdag::ithenable *t = new libdag::thenable{};

        t->then(foo{}, foo{});
        t->invoke(true, t);

        delete t;
    }

    SECTION("then.with.function_pointer")
    {
        libdag::ithenable *t = new libdag::thenable{};

        t->then(bar, bar);
        t->invoke(true, t);

        delete t;
    }
}
